How do invasive species change the diversity index?

An invasive species will often become dominant in which case the diversity index would decrease. This happens when the invasive species pushes out other species as it takes over the area. If the invasive species is unable to adapt, the diversity index would likely not change.

This type of galaxy is an approximately ellipsoidal shape and a smooth, nearly featureless image. they are the largest single star systems, in the universe and are built by the collisions of many smaller galaxies.